Chair



E. RACZ Jan. 12, 1932.

CHAIR Original Filed Jan. 23, 1928 mvENToR Emea?" Racz A BY W #1M/Mmm Y%gaf ATTORNEYS Patented Jan. 12, 1932 UNITED STATES PATENT OFFICE ERNEST RACZ, OF DETROIT, MICHIGAN, ASSIGNOR T BURROUGHS ADDING MACHINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN CHAIR Original application led January 23, 1928, Serial No. 248,595. Divided and this application led June 15, 1929. Serial No. 371,165.

This invention relates to a chair and the present application is a division of my copending application Serial No. 248,595 filed January 23rd, 1928, now matured into Patent No. 1,756,210.

'The general object of the invention is to provide an improved oiiice chair, the invention being directed particularly to a simplifled construction of back rest and seat.

` Other objects and advantages of the invention will appear from the specification and drawings. y

An embodiment of the invention is shown in the accompanying drawings in which;

Figure 1 is a side elevation of the chair showing the seatand back rest;

Fig. 2 is alrear elevation of the chair;

Fig. 3 is a partial perspective showing the clamping means used to hold the back rest in adjusted position.

The chair includes a base 1 supporting a cylindrical standard 2 on which is swiveled a cylindrical sleeve 3 by means of a ball bearing 4. A cylindrical stem or shank 5 telescopes into the sleeve 3 and is held in various adjusted positions by an adjusting device 6. The shank 5 supports a seat spider 7 to which is bolted a seat plate S comprising a relatively thin flat metal plate. This provides a conl struction that is extremely rigid and durable and at the same time one that is simple and inexpensive to manufacture.

The back of the chair can not only be adjusted vertically but it can also be adjusted to various inclined positions. These adjustments are attained by an extremely simple construction as follows:

. The back is supported by a single metal standard 1() which has a cross member 11 integral with it, the two forming a T-shaped support. This support is made of standard metal tubing cut to the required length with one part welded to the other. Pivoted to the support is a back plate 12 comprising a metal stamping having ears 13 projecting at right angles from its edges, these ears being pivoted to the ends of the cross bar 11 by means of pivot bolts 14. A rubber tipped abutment 15 is fixed to the back plate in position to contact the standard l0 so as to hold the vback plate in proper vertical position.

A back cushion 16 is detachably fastened to the back plate 12 by snap fasteners such as the snap fastened 17 (Fig. 2).

This construction of chair back is extremely simple, durable and inexpensive.` It will be observed that it is devoid of unnecessary parts, is made of a minimum amount of material, and all the parts, except the cushion, are made vof metal.

The vertical standard 10 extends through an openingin the seat plate 8 which opening 1s slightly larger than the standard. It will be obvious that, owing to its thinness, the seat plate 8 affords little support for the standard 10 as far as swinging back and forth or sideways is concerned. In order to hold the standard in position and permit lit to be adjusted, a simple and novel construction has been provided comprising a thin, right-angle, metal plate 20 which is riveted or otherwise fastened to the seat plate 8 as illustrated in Figs. 1 and 2, with the body of the plate projecting downward. This plate is provided with a slot 21 toward its lower end and positioned in this slot is a bolt 22 having a lthumb nut '23 screw threaded on its end. This bolt also passes through two'ends of a spring clamp 24 that surrounds the back seat standard l0. Surrounding the bolt and positioned between the ends of the clamp is a spring 25 that urges the ends of the clamp outward to free it from the standard 10. The clamp has two upper horizontal ears 26 which are bent laterally and shaped so that their edges engage the standard 10 to assist in holding the clamp in place. Similar ears 27 are bent from the lower edges of the clamp. These two sets of'ears serve to hold the clamp in a horizontal positionthereby preventing it from assuming an angle so that the standard 10 may be adjusted up and down without jamming.

This simple construction not only holds the back standard 1() rigidly in position but it also permits the standard to be adjusted vertically as well as backward and forward to various inclinations. When the thumb nut 23 is loosened the spring 25 forces the ends of the clamp outwardly and releases the standard 10. It may then be raised up or pushed down to the proper height, the standard 10 slipping through the clamp 24. It a diii'erent angular adjustment of the back rest is desired, the standard l can be swung about the seat plate V8 as a pivot, the bolt 22 moving in the slot/21 in the plate 20. Such an adjustment is indicated in dot and dash lines in Fig. l. After the back rest has been adjusted to the proper position the thumb nut 23 is w tightened with the result that the backrest is held rigidly against vertical movementby the clamp 24 and against angular movement Abythe clamp v2li and the seat plate 8 which afford two points of support. y i5 Y The advantages of the combined constructionare extreme simplicity, neat appearance, eonvenientY adjustability, inexpensive construction, and durability, thistype of chair being subjected to very hard usage about ozo ices and factories. f

*I claim: Y y 1. A chair hav-ing a thin metal seat proy vided with an opening, a back rest standard extending through said opening, said stand- 525 ard being freely ajustable vertically through said opening and being movable, in its'diierent vertical positions, about the edges of said opening as a pivot to different inclined positions, an-d a single clamping means beneath said seat acting to hold said standard in its different vertical positions and acting in ooml bination with-theedges of said seat opening zto hold said standard `in its different inclined positions.v v Y 2. Alchair having a thin ymetal seat, a single standard extending-through an opening in said seat, a metal plate projecting downiwardly `from said seat and provided with a 1 slot in'its lowerend, a clamp surrounding said standard, and means extending through ysaid slot for tightening said clamp and holding it to* said platewhereby said standard kmay he held indifferent vertical and differ- `entinclined positions.

"- .3; A chair having a metal seat, a single back rest standard extending through an opening in said seat, 'a' metal plate projecting I downwardly from said seat and provided with an elongated slot-in its lower end, a clamp surrounding said standard, a bolt extending through said slot and the ends of said clamp and provided with a nut whereby saidl clamp may be tightened aboutsaid standard and held in different positions in the slotin said l plateto'hold the back rest standard in different positions. f

In testimony'whereof, I have subscribed my name.

i ERNEST RAGZ. 

